Plastic Behavior and Microstructure Heterogeneity of an AA6063-T6 Aluminum Alloy Processed by Symmetric and Asymmetric Rolling
Rolling is one of the most employed industrial processes which can be used at multiple manufacturing stages, allowing different geometries such as plates, rods, profiles, billets, slabs, tubes, and seamless tubes to be obtained. However, rolled products develop anisotropy due to the preferential ori...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/10/1551 |
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| author | Jairo Alberto Muñoz Tarek Khelfa Gonzalo Ariel Duarte Martina Avalos Raúl Bolmaro José María Cabrera |
| author_facet | Jairo Alberto Muñoz Tarek Khelfa Gonzalo Ariel Duarte Martina Avalos Raúl Bolmaro José María Cabrera |
| author_sort | Jairo Alberto Muñoz |
| collection | DOAJ |
| description | Rolling is one of the most employed industrial processes which can be used at multiple manufacturing stages, allowing different geometries such as plates, rods, profiles, billets, slabs, tubes, and seamless tubes to be obtained. However, rolled products develop anisotropy due to the preferential orientation of crystals in the rolling direction. Thus, some process configurations and different processing parameters (e.g., thickness reduction per rolling pass, deformation routes, roll diameters, and strain rate) have been proposed to deal with the desired anisotropy. In this context, this investigation evaluates and compares the effect of symmetrical and asymmetrical rolling on an aluminum alloy sheet deformed until a 38% thickness reduction using multiple rolling passes. The asymmetrical process displayed larger texture and microstructure gradients across the sheet thickness than the symmetrical one, manifested as more grain refinement and more intense shear texture components close to sheet surfaces. In terms of plastic anisotropy, the visco-plastic self-consistent model predicted higher average anisotropy for the symmetric rolling than the asymmetric process due to a strong combination of recrystallization and deformation texture components. Conversely, the asymmetric process showed lower planar anisotropy values due to the increase in the fraction of shear and deformation texture components near the sheet surfaces, producing a less intense overall texture than the symmetric rolling. The additional shear strain component was mainly responsible for the material strengthening and texture weakening after the asymmetrical rolling process. In addition, the shear strain produced grain refinement, decreased misorientation, and higher dislocation densities than the as-received and symmetrically rolled materials. After asymmetrical rolling, the microstructure and texture showed heterogeneous profiles across the sheet thickness. This gave rise to a heterogeneous grain size refinement, decreased misorientation close to sheet edges, and plastic gradients. |
| first_indexed | 2024-03-09T19:48:32Z |
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| id | doaj.art-a5a87c16596c450fac1e82488c283c5d |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T19:48:32Z |
| publishDate | 2022-09-01 |
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| record_format | Article |
| series | Metals |
| spelling | doaj.art-a5a87c16596c450fac1e82488c283c5d2023-11-24T01:16:47ZengMDPI AGMetals2075-47012022-09-011210155110.3390/met12101551Plastic Behavior and Microstructure Heterogeneity of an AA6063-T6 Aluminum Alloy Processed by Symmetric and Asymmetric RollingJairo Alberto Muñoz0Tarek Khelfa1Gonzalo Ariel Duarte2Martina Avalos3Raúl Bolmaro4José María Cabrera5Department of Materials Science and Engineering EEBE, Universidad Politécnica de Catalunya, c/Eduard Maristany 10-14, 08019 Barcelona, SpainDepartment of Materials Engineering, School of Energy and Electromechanical Engineering, Hunan University of Humanities Science and Technology, Loudi 417000, ChinaDepartment of Physics and Space Sciences, Universidad de Granada, Calle Prof. Vicente Callao, 3, 18011 Granada, SpainInstituto de Física Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas-CONICET, Universidad Nacional de Rosario, Ocampo y Esmeralda, Rosario 2000, ArgentinaInstituto de Física Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas-CONICET, Universidad Nacional de Rosario, Ocampo y Esmeralda, Rosario 2000, ArgentinaDepartment of Materials Science and Engineering EEBE, Universidad Politécnica de Catalunya, c/Eduard Maristany 10-14, 08019 Barcelona, SpainRolling is one of the most employed industrial processes which can be used at multiple manufacturing stages, allowing different geometries such as plates, rods, profiles, billets, slabs, tubes, and seamless tubes to be obtained. However, rolled products develop anisotropy due to the preferential orientation of crystals in the rolling direction. Thus, some process configurations and different processing parameters (e.g., thickness reduction per rolling pass, deformation routes, roll diameters, and strain rate) have been proposed to deal with the desired anisotropy. In this context, this investigation evaluates and compares the effect of symmetrical and asymmetrical rolling on an aluminum alloy sheet deformed until a 38% thickness reduction using multiple rolling passes. The asymmetrical process displayed larger texture and microstructure gradients across the sheet thickness than the symmetrical one, manifested as more grain refinement and more intense shear texture components close to sheet surfaces. In terms of plastic anisotropy, the visco-plastic self-consistent model predicted higher average anisotropy for the symmetric rolling than the asymmetric process due to a strong combination of recrystallization and deformation texture components. Conversely, the asymmetric process showed lower planar anisotropy values due to the increase in the fraction of shear and deformation texture components near the sheet surfaces, producing a less intense overall texture than the symmetric rolling. The additional shear strain component was mainly responsible for the material strengthening and texture weakening after the asymmetrical rolling process. In addition, the shear strain produced grain refinement, decreased misorientation, and higher dislocation densities than the as-received and symmetrically rolled materials. After asymmetrical rolling, the microstructure and texture showed heterogeneous profiles across the sheet thickness. This gave rise to a heterogeneous grain size refinement, decreased misorientation close to sheet edges, and plastic gradients.https://www.mdpi.com/2075-4701/12/10/1551asymmetrical rollingtexture evolutionAl alloymicrostructure heterogeneityanisotropy |
| spellingShingle | Jairo Alberto Muñoz Tarek Khelfa Gonzalo Ariel Duarte Martina Avalos Raúl Bolmaro José María Cabrera Plastic Behavior and Microstructure Heterogeneity of an AA6063-T6 Aluminum Alloy Processed by Symmetric and Asymmetric Rolling Metals asymmetrical rolling texture evolution Al alloy microstructure heterogeneity anisotropy |
| title | Plastic Behavior and Microstructure Heterogeneity of an AA6063-T6 Aluminum Alloy Processed by Symmetric and Asymmetric Rolling |
| title_full | Plastic Behavior and Microstructure Heterogeneity of an AA6063-T6 Aluminum Alloy Processed by Symmetric and Asymmetric Rolling |
| title_fullStr | Plastic Behavior and Microstructure Heterogeneity of an AA6063-T6 Aluminum Alloy Processed by Symmetric and Asymmetric Rolling |
| title_full_unstemmed | Plastic Behavior and Microstructure Heterogeneity of an AA6063-T6 Aluminum Alloy Processed by Symmetric and Asymmetric Rolling |
| title_short | Plastic Behavior and Microstructure Heterogeneity of an AA6063-T6 Aluminum Alloy Processed by Symmetric and Asymmetric Rolling |
| title_sort | plastic behavior and microstructure heterogeneity of an aa6063 t6 aluminum alloy processed by symmetric and asymmetric rolling |
| topic | asymmetrical rolling texture evolution Al alloy microstructure heterogeneity anisotropy |
| url | https://www.mdpi.com/2075-4701/12/10/1551 |
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